@techreport{oai:ipsj.ixsq.nii.ac.jp:00069900,
 author = {土井, 啓成 and 中村, 圭吾 and 戸田, 智基 and 猿渡, 洋 and 鹿野, 清宏 and Hironori, Doi and Keigo, Nakamura and Tomoki, Toda and Hiroshi, Saruwatari and Kiyohiro, Shikano},
 issue = {2},
 month = {Jul},
 note = {喉頭摘出者は自身の声帯振動を用いた発声が不可能であるため，代用発声法で発声を行う．代用発声法により，喉頭摘出者は発声が可能になるが，生成される無喉頭音声は，健常者の通常音声と比較して，音質が低く，話者性も劣化してしまう．そのため本稿では，統計的手法による無喉頭音声の音質及び話者性の改善を試みる．無喉頭音声の音質改善には，統計的声質変換に基づく音質改善法 (AL-to-Spech) がこれまでに提案されている．本稿では，AL-to-Speech に対して，変換音声の声質を柔軟に制御することができる 1 対多固有声変換を導入することで，音質及び話者性の改善を行う．客観評価及び主観評価結果から，提案法が高い音質改善効果を持ちつつ，声質の制御が可能であることを示し，無喉頭音声の音声及び話者性の改善に有効であることを示す．, This paper proposes the improvement method based on one-to-many eigenvoice conversion (EVC) for sound quality and speaker individuality of three types of alaryngeal speech: esophageal speech; electrolaryngeal speech; and body-conducted silent electrolaryngeal speech. Although alaryngeal speech allows laryngectomees to utter speech sounds, it suffers from lack of naturalness and speaker individuality. To improve the sound quality of alaryngeal speech, alaryngeal-speech-to-speech (AL-to-Speech) methods based on statistical voice conversion have been proposed. This paper further applies one-to-many EVC capable of flexibly adapting the conversion model to given target natural voices to the AL-to-Speech methods for recovering speaker individuality of alaryngeal speech. The experimental results of objective and subjective evaluations demonstrate that the proposed methods yield significant improvements of speech quality and make the converted voice quality similar to the given target voice quality.},
 title = {1対多固有声変換に基づく無喉頭音声の音質及び話者性の改善},
 year = {2010}
}